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The fundamental properties and possible applications of non-classical light are extensively investigated starting from the mid-70s. In the past decade such novel fields of application of non-classical light have emerged, as quantum imaging and quantum information. Quantum imaging (e.g. the low-noise generation, processing and detection of optical images) is essentially based on the spatially-multimode non-classical states of light with quantum fluctuations, suppressed not only in time, but also in space. It is natural and produceful to extend the concepts and approaches, developed in quantum imaging, to phenomena of quantum information, thus introducing parallelism and all-optical methods to the latter field of research. The general goal of the project is, on the one hand, to elaborate both theoretically and experimentally new approaches to the generation of broadband in space-time squeezing and entanglement and to its application to quantum imaging, and, on the other hand, to investigate the advantages, provided by multimode squeezed light in optical phenomena of quantum information.The project focuses on the following objectives and scientific outputs:Quantum holographic teleportation and entanglement-based phenomena in quantum imagingTo investigate quantum limits to the recently proposed phenomenon of quantum holographic teleportation of optical images with the use of broadband in space-time light with non-classical correlations. In particular, to find the resolving power in space-time and to formulate the appropriate measures for the fidelity of quantum holographic teleportation. To investigate the space-time non-local correlations in the spatially - multimode EPR fields, and the entanglement swapping and the entanglement transfer by quantum holographic teleportation. To research the possible relation of quantum holographic teleportation to other entanglement-based optical phenomena of quantum information in the case of continuous spatially-multimode light waves.

Quantum key distribution with squeezed states of lightThe continuous variable versions of the protocols of quantum cryptograhy, dense coding and teleportation, based on squeezed states of light, are free from some shortcomings of the single-photon technique. The objective is: to analyse theoretically quantum cryptography with single-mode and two-mode squeezed states of light produced by degenerate and non-degenerate optical parametric amplifiers, including development of new protocols for quantum key distribution using binary and non-binary alphabets, and to prove their security.

Space-time statistics and non-local correlations in non-classical light from optical parametric oscillatorsTo investigate experimentally the possibilities to observe local squeezing and non-local quantum correlations in the spatially-multimode optical field produced by OPO's in various configurations and to evaluate possible applications of these effects to quantum imaging and all optical parallel information processing.

Spatial properties of non-classical light fields, generated via parametric amplification by the low-frequency pumping and consecutive interactionsA novel promising approach to the generation of non-classical light is based on the nonlinear quasi-phase-matched interactions in periodically poled nonlinear crystals, allowing for the consequtive interactions of three-frequency light waves in the same nonlinear crystal.

The objectivs are: To study theoretically the formation of spatially-multimode squeezed states of light by low-frequency parametric amplification, based on the consecutive three-frequency interactions. To investigate quantum fluctuations in the amplification and frequency conversion of optical images by consecutive interactions.